[cisco-voip] CCM Intercluster trunk with breakout to private phone VPN

[Peter Slow]

Damian,
   I think you really ought to look at using a CUBE (to avoid having
to do NAT) along with a gatekeeper to do the proper routing between
this third cluster in your network. That will put you in a position to
be able to grow without your route patterns and trunks becoming
insanely complex. you shoudl put that infrastructure in place before
it gets out of control. it sounds liek you're on your way to having a
fairly complex voice network.

using a GK will allow you to route calls directly to the right phoen
system, wihtout sending all of them through a cluster that may or may
not be the final destination. your life will be easier and your
callflow will be simpler =) (and your network will  scale better too.)

-Pete

On Fri, Jan 8, 2010 at 4:07 PM, Fuermann, Jason <JBF005 at shsu.edu> wrote:
> If I understood you correctly, the answer is yes, as long as you get your
> CSS and partitions right. I don’t remember the ports off the top of my head,
> but I’m sure google does
>
>
>
> From: cisco-voip-bounces at puck.nether.net
> [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Damian Turburville
> Sent: Friday, January 08, 2010 11:00 AM
> To: cisco-voip at puck.nether.net
> Subject: [cisco-voip] CCM Intercluster trunk with breakout to private phone
> VPN
>
>
>
> Hi all,
>
> First let me lay out the situation, we have a mixture of offices with a
> mixture of phone systems including meridian, siemens DX, siemens Hi-Path and
> Cisco Call Manager. They are all part of a local Featurenet system where
> they can make (5-digit) extension to extension calls to each over what
> amounts to a private phone VPN (mainly DPNSS over E1)
> We have a trusted third party whom we have a firewalled off 2mb data link to
> who has a call manager 4.x.
> The idea is for us to be able to make calls and receive calls to this call
> manager 4.x
> Would it be possible to setup an Intercluster trunk between their call
> manager and one of ours (we have a 4.1 and a 6.1) and have them break out
> onto our private phone VPN from our call manager?
> To hopefully make it more clear
>
> Site A - trusted third party with call manager 4.x (extension range 68xx)
> Site B - internal site with call manager (extension range 66xxx)
> Site C - other internal site with another phone system (extension range
> 20xxx)
>
> So if we setup an Intercluster trunk between Site A and Site B would Site A
> be able to call Site C and vice versa?
> Also would anyone know what ports we would need to open on our firewall (we
> would have to NAT the connection) to allow this to work.
> Thanks,
> Damian
>
>
>
>
>
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